Process of manufacturing building blocks



March 23 1926.

c A. PERKINS ET AL PROCESS OF MANUFACTURING BUILDING BLOCKS Filed August 28. 1924 Clifton A. Perli-Lns Herbert A.Perliins WITNESS:

Patented Mar. 23, 1926,

UNITED STATES PATENT OFFICE.

CLIFTON A. PERKINS AND HERBERT A. PERKINS, OF HOLLY OAK VILLA, DELAWARE.

PROCESS OF MANUFACTURING BUILDING BLOCKS.

Application filed August 28, 1924. Serial No. 734,768.

To all LC/7107?} it may concern: proved type, after which the concrete is Be it known that we, CLIFTON A. PERKINS poured in the mold and the block is formed and Hnnmnrr A. PERKINS, citizens of the in the usual manner. However in the form- United States, residing at Holly Oak Villa, ing of the block'in this manner, some of the in the county of New Castle and State of cement or concrete will be forced through Delaware, have invented new and useful and mingled with the facing material show- Improvements in Processes of Manufacturing through and disfiguring the face of the ing Building Blocks, of which the following block which is undesirable, and to prevent (19 is a specification. this concrete or baser material showing This invention relates to building blocks through the face 3 the face of the building of the cementitious nature and an object of block is thoroughly washed while the block the invention is to provide a cementitious is still green by a spray of water or any building block the major portion of which is other suitable fluid which is forced with 65 formed of a relatively coarse inexpensive from 40 to 4L5 pounds pressure through a material while the face of the block is spray nozzle causing the water to strike formed of a relatively more expensive mathe face of the block in fine streams and terial of a liner and better appearance, therethoroughly wash the concrete from amongst by permitting the forming of buildings of the particles of the facing material without the improved building blocks in such manaffecting or dislocating the adhering parts ner as to simulate marble, stone, or analoof the facing material and providing a gous expensive building materials. slightly roughened granite appearing face More specifically the present invention on the block. comprehends the forming of a granite ap- It is, of course, to be understood, that the pearing or simulating face on the front of invention may be constructed in various concrete blocks and the process embodied in other manners and the parts associated in forming such blocks which permits the face different relations, and therefore, we do not of the block to be free from showing any of desire to be limited in any manner, except the concrete or baser material. as set forth in the claim hereunto appended.-

Other objects of the invention ill appear hat we claim is in the following detail description, and in The process of moulding a building block the accompanying drawings wherein: with a natural stone appearance on its front Figure 1 is a top plan of a building block face which consists of placing a layer of a constructed in accordance with this invenmixture of granite. dust, ground mica, black tiou. slag and white cement in a mould, complet- 35 Figure 2 is a vertical section through the ing the major block formation in the mould building block taken on the line 2-2 Figby the addition to the layer of a relatively ure 1. coarse cementitious material, removing the lleferring specifically to the drawings, the block from the mould while in a green conbuilding block 1 has its major portion 2 dition and subjecting the outer face of the formed of concrete or analogous relatively block which consists of the said layer, to a inexpensive cementitious material such as spray wash for removing from the face commonly used in the forming of building thereof, the coarse cementitious sediment blocks. The face 3 of the block however is which has penetrated through the said layer formed from a composition of materials such during the initial setting period, for effectas granite dust, ground mica, black slag and ing a natural stone simulation on the other white cement in suitable proportions and face of the said layer and then completely these are thoroughly mixed so that when drying the block. finished the face of the block will simulate In testimony whereof we aflix our signagranite. tures.

In the forming of the block, the proper I proportion of the facing material above CLIFTON A. PERKINS. menti ned is fi s p d in a m ld of ap- A, PERKINS? Certificate of Correction.

It is hereby certified that in Letters Patent No. 1,578,091, granted March 23, 1926, upon the application of Clifton A. Perkins and Herbert A. Perkins, of Holly Oak Villa Delaware, for an improvement in Processes of Manufacturing Building locks, an error appears in the printed specification requiring correction as follows: Page 1, line 97, in claim, for the word other read outer; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Oflice.

Signed and sealed this 20th day of April, A. D. 1926.

[SEAL] M. J. MOORE, 4 Acting Commtissioner of Patents. 

